@WG- You don't need such a complicated example. You can break it down, that it is not possible to expand a.(b + c) although the distributive law holds for matrices.
@halirutan Hi, This is indeed a much easier code. I have only only problem with it. For some reason I can't take a Fourier transform of the image it creates. I've read a bit and saw that the Fourier operator does accept sparse arrays so I don't know why it won't run. Here is the code ApertureSize = {300, 300}; DiscRadius = 20; PhaseDisc0 = 10; Disc1 = {40, 50}; PhaseDisc1 = 10; Disc2 = {200, 250}; PhaseDisc2 = 15; Disc3 = {200, 200}; PhaseDisc3 = 30; MagnificationAperture = 0.5; MagnificationFT = 0.5;
The Fourier transform is defined as:
$$
H(f)=\int_\infty^\infty h(t) e^{2\pi i f t}dt\\
h(t)=\int_\infty^\infty H(f) e^{-2\pi i f t}df
$$
where $h(t)$ is the signal, and $H(f)$ is it's Fourier transform, if $t$ is meassured in second, then $f$ is measured in Hz.
The discrete Fourier transform ...
@halirutan If you are willing to help for the last time, I have one last problem I can't figure out. When I chose these placings for the discs, I expect the FT of the image to be beating along the line connecting the 2 discs. I don't know why but for some reason I get a rotation of exactly -pi/4 of the FT. I tried using the Rotate operation but it rotates the whole box. It is also interesting to know what's causing this behavior. Thanks in advance! ApertureSize = {300, 300};
I've seen a couple of examples of self-answered questions used to show a technique that a user discovered or derived. One of them was advertised up-front as such; the author wrote something like "I'm posting this as a self-answered question in the hope of sharing something useful I created ..."
...
@Öskå re hypnotoad - you are most welcome. You might not be aware of the fact, but one of our esteemed mods carried that name for a while (and a jolly good time we had with that, too).
@YvesKlett Nothing fancy :D Got green beans from my garden, plenty of them, so it's going to be green beans! But they have to be "prepared", it's called "beheaded" here :P
Summer has drawn to a close, and so too have our annual internships. Each year Wolfram welcomes a new group of interns to work on an exciting array of projects ranging all the way from Bell polynomials to food science. It was a season for learning, growth, and making strides across disciplinary and academic divides. [...]
By the way, Vitaly used to be a moderator right? I just noticed he doesn't show up anymore when sorting the users by "moderator". Maybe it's because I mixed up Verbeia and Vitaly for some time.
Is there anyone around who's still running 10.0.0 and not 10.0.1? Could you check the Java version and let me know?
@rhermans I wasn't able to reproduce the problem with the uploader on Windows with M10.0.1.
@ People using the SE Image Uploader: do you have any problems with it in Mathematica 10.0.1? Does it ever hang after pressing the upload button?
Has anyone tried running Mathematica on Yosemite? Were there any compatibility problems? If not, have you also tried using LibraryLink or Compile[... CompilationTarget -> "C"]?
@Szabolcs Thanks for checking. I have been trying again, and I have the impression that there is some external factor that matters. At some time during the day (London) it did work, fine, slow the first time, fast after. In other occasion, yesterday night, it will hang, say "not responding" then offer to abort dynamic evaluation, but if I wait instead of closing it, it will work the second time. I wander if there is some time-out on the communication with imgur.
@MichaelHale If you don't see the 10.0.1 download then something went wrong with your Wolfram account. You should complain and it'll be fixed. I never got 10.0.0 until I complained about it. You might even try Live Chat, should be open for one hour longer wolfram.com/support/contact
@SjoerdC.deVries Are you here by any chance? You had trouble with the uploader too, right?
OK, I just shoot and you can read later. I realized that there should be a most easy way to test the upload routine itself. If you have the uploader properly installed than the java jar of it is visible in Mathematica and you can call the upload routing by yourself.
Here is how it works: create an image and convert it to a a png-string, load JLink and install Java and the just send the image:
@rhermans I guess what happens is that due to this error JavaInstall is horrible slow. We call this in the palette and therefore the first run seems to hang.
Once java is installed, InstallJava doesn't do anything but return.
But the slow part is JLink`JavaBlock[ JLink`LoadJavaClass["de.halirutan.uploader.SEUploader", StaticsVisible -> True]; SEUploader`sendImage[ToCharacterCode[png]]]
Recently (despite the one year of active participation) I noticed that our nice Penrose background consists of identical blocks with visible joints between them:
Of course, it is not a critical problem. But sometimes I become a perfectionist so I ask the question: is it possible to corr...
The Fourier transform is defined as:
$$
H(f)=\int_\infty^\infty h(t) e^{2\pi i f t}dt\\
h(t)=\int_\infty^\infty H(f) e^{-2\pi i f t}df
$$
where $h(t)$ is the signal, and $H(f)$ is it's Fourier transform, if $t$ is meassured in second, then $f$ is measured in Hz.
The discrete Fourier transform ...
Recently (despite the one year of active participation) I noticed that our nice Penrose background consists of identical blocks with visible joints between them:
Of course, it is not a critical problem. But sometimes I become a perfectionist so I ask the question: is it possible to corr...
